* Convert ObjectType to a concrete child model of ContentType
* Add public flag to ObjectType
* Catch post_migrate signal to update ObjectTypes
* Reference ObjectType records instead of registry for feature support
* Automatically create ObjectTypes
* Introduce has_feature() utility function
* ObjectTypeManager should not inherit from ContentTypeManager
* Misc cleanup
* Don't populate ObjectTypes during migration
* Don't automatically create ObjectTypes when a ContentType is created
* Fix test
* Extend has_feature() to accept a model or OT/CT
* Misc cleanup
* Deprecate get_for_id() on ObjectTypeManager
* Rename contenttypes.py to object_types.py
* Add index to features ArrayField
* Keep FK & M2M fields pointing to ContentType
* Add get_for_models() to ObjectTypeManager
* Add tests for manager methods & utility functions
* Fix migrations for M2M relations to ObjectType
* model_is_public() should return False for non-core & non-plugin models
* Order ObjectType by app_label & model name
* Resolve migrations conflict
* Move ConfigRevision model & write migrations
* Move ConfigRevision resources from extras to core
* Extend migration to update original content type for ConfigRevision
* WIP
* WIP
* Add git sync
* Fix file hashing
* Add last_synced to DataSource
* Build out UI & API resources
* Add status field to DataSource
* Add UI control to sync data source
* Add API endpoint to sync data sources
* Fix display of DataSource job results
* DataSource password should be write-only
* General cleanup
* Add data file UI view
* Punt on HTTP, FTP support for now
* Add DataSource URL validation
* Add HTTP proxy support to git fetcher
* Add management command to sync data sources
* DataFile REST API endpoints should be read-only
* Refactor fetch methods into backend classes
* Replace auth & git branch fields with general-purpose parameters
* Fix last_synced time
* Render discrete form fields for backend parameters
* Enable dynamic edit form for DataSource
* Register DataBackend classes in application registry
* Add search indexers for DataSource, DataFile
* Add single & bulk delete views for DataFile
* Add model documentation
* Convert DataSource to a primary model
* Introduce pre_sync & post_sync signals
* Clean up migrations
* Rename url to source_url
* Clean up filtersets
* Add API & filterset tests
* Add view tests
* Add initSelect() to HTMX refresh handler
* Render DataSourceForm fieldsets dynamically
* Update compiled static resources
